30120012 has 60 divisors (see below), whose sum is σ = 84808416. Its totient is φ = 9266400.

The previous prime is 30120011. The next prime is 30120017. The reversal of 30120012 is 21002103.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 30119976 and 30120003.

It is not an unprimeable number, because it can be changed into a prime (30120011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 637 + ... + 7787.

Almost surely, 2^30120012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30120012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42404208).

30120012 is an abundant number, since it is smaller than the sum of its proper divisors (54688404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30120012 is a wasteful number, since it uses less digits than its factorization.

30120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180 (or 7169 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 30120012 is about 5488.1701868656. The cubic root of 30120012 is about 311.1370384099.

Adding to 30120012 its reverse (21002103), we get a palindrome (51122115).

The spelling of 30120012 in words is "thirty million, one hundred twenty thousand, twelve".